Which GPIO pin can be used to UART(RS232) in nRF52820?

[James_Kor]

I cannot find the GPIO configration documents.

[Simonr]

Hi

Please check out the pin assignments in the product specification. all pins defines as General purpose I/O can be used for UART, but the ones that are recommended as "Standard drive, low frequency I/Os only" should not be used for high frequency purposes while the radio is running to prevent interference.

Best regards,

Simon

[James_Kor]

Thanks for answer clearly.